Jonathon Sullivan MD, PhD, FACEP, SSC is an emergency physician and the owner of Greysteel Strength and Conditioning, a Starting Strength Gym in Farmington Michigan. He is focused on the science and practice of strength training to combat the degeneration and diseases of aging. He is a former US Marine and a 3d Dan in Tang Soo Do. Sully is an Associate Professor of Emergency Medicine at Wayne State University, where he see patients and teaches and formerly conducted neuroscience research. His book “The Barbell Prescription,” with Coach Andy Baker, is forthcoming from the Aasgaard Company.